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Date:      Fri, 12 May 2000 02:20:43 -0400 (EDT)
From:      Marc Tardif <intmktg@CAM.ORG>
To:        freebsd-net@freebsd.org
Subject:   ppp filter
Message-ID:  <Pine.LNX.4.10.10005120157040.11288-100000@Gloria.CAM.ORG>

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How can I redirect www requests from the modem interface on one host to
another host on my local network?

My current network consists of the following machines, where the "fbsd"
host also has a modem interface (tun0) with the static IP 1.1.1.1 (for
discussion's sake):
  192.168.0.1  fbsd.box.com   fbsd
  192.168.0.2 fbsd2.box.com   fbsd2

What I have tried so far is to connect to my isp using ppp and the nat
flag and then setting a filter as follows:
fbsd# ppp -nat isp
ppp ON fbsd> dial
PPP ON fbsd> set filter in 0 permit 1.1.1.1 192.168.0.2 tcp src eq 80 dst
eq 80

Unfortunately, once I set the filter, I cannot ping anywhere outside my
local network so I cannot put tcpdump to good use. Any suggestions to
either solve the problem or help get anywhere with this problem would be
much appreciated.

Marc Tardif



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